| static private dradb3 ( int ido, int l1, float cc, float ch, float wa1, int index1, float wa2, int index2 ) : void | ||
| ido | int | |
| l1 | int | |
| cc | float | |
| ch | float | |
| wa1 | float | |
| index1 | int | |
| wa2 | float | |
| index2 | int | |
| return | void | |
static void dradb3(int ido,int l1,float[] cc,float[] ch,
float[] wa1, int index1,
float[] wa2, int index2)
{
int i,k,t0,t1,t2,t3,t4,t5,t6,t7,t8,t9,t10;
float ci2,ci3,di2,di3,cr2,cr3,dr2,dr3,ti2,tr2;
t0=l1*ido;
t1=0;
t2=t0<<1;
t3=ido<<1;
t4=ido+(ido<<1);
t5=0;
for(k=0;k<l1;k++)
{
tr2=cc[t3-1]+cc[t3-1];
cr2=cc[t5]+(taur*tr2);
ch[t1]=cc[t5]+tr2;
ci3=taui*(cc[t3]+cc[t3]);
ch[t1+t0]=cr2-ci3;
ch[t1+t2]=cr2+ci3;
t1+=ido;
t3+=t4;
t5+=t4;
}
if(ido==1)return;
t1=0;
t3=ido<<1;
for(k=0;k<l1;k++)
{
t7=t1+(t1<<1);
t6=(t5=t7+t3);
t8=t1;
t10=(t9=t1+t0)+t0;
for(i=2;i<ido;i+=2)
{
t5+=2;
t6-=2;
t7+=2;
t8+=2;
t9+=2;
t10+=2;
tr2=cc[t5-1]+cc[t6-1];
cr2=cc[t7-1]+(taur*tr2);
ch[t8-1]=cc[t7-1]+tr2;
ti2=cc[t5]-cc[t6];
ci2=cc[t7]+(taur*ti2);
ch[t8]=cc[t7]+ti2;
cr3=taui*(cc[t5-1]-cc[t6-1]);
ci3=taui*(cc[t5]+cc[t6]);
dr2=cr2-ci3;
dr3=cr2+ci3;
di2=ci2+cr3;
di3=ci2-cr3;
ch[t9-1]=wa1[index1+i-2]*dr2-wa1[index1+i-1]*di2;
ch[t9]=wa1[index1+i-2]*di2+wa1[index1+i-1]*dr2;
ch[t10-1]=wa2[index2+i-2]*dr3-wa2[index2+i-1]*di3;
ch[t10]=wa2[index2+i-2]*di3+wa2[index2+i-1]*dr3;
}
t1+=ido;
}
}
